Missing O-rings from idle mixture screw : r/Fixxit

As fitted to many makes & models of motorcycle with Mikuni & Keihin carburettors. Mikuni part No's This item is for 4x washers & 4x O rings. This tiny

Mikuni / Keihin O Rings + Washers For Carb Idle Pilot Mixture Fuel Air Screws x4

Missing a small washer on the idle mixture screw of my carburetor

carburetor - What could be the result of this missing o-ring

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Missing a small washer on the idle mixture screw of my carburetor